Motor-driven hair-clipper



n. N. swATzELL.

MOTOR DRIVEN HAIR CLIPPER.-

APPLICATION HLED JULY 17.1919.

1,352,326. I PatentedSept. 7,1920.

2 SHEETS-SHEET I.

(qua/e ntor' Attorney 'l tn/ess I I ZWMg/ I I n. N/SWATZELL.

MOTOR DRIVEN HAIR CLIPPER.

APPLICATION FILED .IULY 17,1919.

Patented Sept. 7,1920.

2 SHEETSSHEET 2.

Wan/e 8S Attorney arr srars rriceqi- DAVID 1v. SWATZEIL, 0F BIRMINGHAM,- ALABAMA, AssIenoR arena-FOURTH .TO B. P.

cox; ONE-FOURTH T0 12.. c. ADOOCK, ANDONE-FOURTH TO w. e. SVJATZELL, ALLIOF BIRMINGHAM, ALABAMA.

MOTOR-DRIVEN HAIR-CLIPPER.

To all whom it may concern:

Be it known that 1, DAVID N. SWATZELL, a citizen of the United States of America, residing at Birmingham, in the county of Jefferson and State of Alabama, have in vented certain new and useful Improve.

ments in Motor-Driven Hair-Clippers, of which the following is a specification.

My invention relates to motor ,driven barbers hair clippers. g I I Oneobject of my invention is to avoid the disadvantages incident to. a speed reducing drive in the clippers or clipper handle by placing the speed reducing gearing between the motor and the flexible driving shaft so that the latter turns at a slow operating speed and therefore. with less vibration and resultant wear.

A further object is to simplify the transmission drive from the flexible shaft to the movable clipper element and to this end my invention contemplates disposing the driving element at right angles to the plane in V which the movable clipper element reciprocates; this. arrangement enabling me I to" greatly simplify the drive and to reduce the size, number and costof parts.

A. further object of my' inventionis to provide a novel type of transmission slide to work between a motor driven crank in the clipper and the reciprocatingclipper blade, this slide being especially designed for simplicity in construction and for the inexpensive manner in whichjt can be assembled in the clipper and :guided'in its travel.

My invention also comprises the novel details of construction and arrangements of parts, which in their preferred embodiment only are illustrated in the drawings, and in which Figure 1 illustrates the clipper apparatuscomplete with the casing for the motor drive broken away.

Fig. 2 is a cross sectional view enlarged and taken through the clipperon the line 22 of Fig. 3.

Figs. 3 and 4 are vertical cross sectional views taken on the lines 33 and 4-4, respectively, of Fig. 2.

Similar reference numerals refer to similar parts throughout the drawings.

In the embodiment of my invention illus- 10 and then to couple-to a crank shaft 11 that is journaledin the clipper. The ends of the elements 9 and 11 are flattened to form complementary clutch elements; The sleeve is screwed intoa socket in the overhung top extension 12 of the main clipper frame 13, 'a transverse recess 14 (see Fig. 4-) being provided in such frame which has parallel top and bottom walls. The wider bottom wall of the recess is overhung at its center by the extension 12 and a top bearing 15 for the shaft 11 being.

provided therein. at the baseof the sleeve socket. bushing 16 inserted in a; hole in the base through which the crank shaft is inserted.

The said bottom Wall of the recess is counter-bored to receive the lowercircular collar of the crank 18 on the shaft, there being a similar collar above the crank which engages the under face of the extension 12.

The bottom clipper plate 19 is attached to the bottom of the main clipper frame by screws- 20 which have their upper ends.

turned to form guide pins 21 which project into the recess 14 on each side thereof. The usual upper or movable clipper plate or The main driving shaft 1 of the.

A bottom bearing is formed in a Specification of Letters iPatcnt. Patgnted Sept, 7., 192() Application fil ed July 17, 1919. Serial No. 311,580.. V

blade 22 is mounted to slide in the stationary blade 19 which latter carries rigid studs 28 which enter elongated slots 24 in the blade 22 and guide it. This movable blade has a center notch 24 in its rear edge adapted to receive the forward downturned arm 25 of the reciprocating transmission slide 26.

This slide has a rearwardly opening central slot 27 for the crank 18 to work in and at each side has alining slots open at their outer ends and adapted to receive the guide pins 21.

The usual cover and presser plate 28 is fitted over the sleeve 10 and is yieldingly pressed down by a coil spring 29 surrounding the sleeve and engaged above by an outer sleeve 30 screwed onto the sleeve 10. I thus yielding-1y press the cover down so that 1ts 7 front edge holds the moving blade down with the proper pressure on the fixed blade.

The customary clipper handles 31 are attached to the frame 18 at each side.

' the crank. '18 to the slide 26 and thence In operation, the motor 1-, through the worm reducing gears 5 and 6, drives the shaft'S at, as low a speed as will directly drive the movin blade at the proper speed for cutting hair, this direct drive being from through arm 25 to the blade. This drive will operate without noticeable vibration or friction thus not causing the clippers to become heated. Also but little lubricant is needed inthe clippers for the low speed drive and it will not give trouble. The tension onthemoving blade 22 can be quickly usted by screwing the outer sleeve 30 up.

or down. The approach of the driving shaft at right angles to the plane of the blades is not inconvenient as such slight pull or drag, as may come from the flexible" shaft, will only tend 'to rock the clipper away from "the work in a direction almost in line with the natural tilting out of the clipper in actual 'I claim as new and desire to secure by Letters Patent, is

1. In a 'barbe'rs hair clipper a frame, a

fixed blade attached thereto by screws having rounded projections above the frame, a

reciprocatory slide guided by said screws, a crank s'haftad'apted to reciprocate said slide,

a movable blade reciprocable with saidslide,

and a flexible driving shaft for said crank shaft. b V

2. In a barbers hair clipper, a-frame hav- 'ing a transverse recess, a crank shaft jour-' naled in the frame and having its crank 7 working in the recess, a slide movable in the recess, -fixed blade attached to the frame,

and a movable blade slidable on the fixed blade and operatively connected to said slide, the fixed blade'being attached to the -frame bysc'rew pins which project into said recess and form guides for said slide.

In a barbers .hair clipper, "a clipper head, :a handle therefor, fixed and movable blades carried by said head, a crank shaft ournaled in said head, a driving connection Tom the crarilrto said movable blade, a

sleeve in which said crank shaft turns, a cover plate over the movable blade, a spring surrounding "said sleeve and engaging said plate, and a screw element on "said'sleeve to regulate the tension n said spring'.

4c. In a barbers hair clipper, a framehaving a transverse recess, a "crank shaft journaled in theframe at right angles thereto I,

and ha'vin'g its crank working in the recess, a slide transversely reciprocable by the i V crank in the recess, guides for the slide" a fixed blade attached to'the base of the frame and projecting forx'vardly' thereof, a movable blade laterally reciprocable onthe fixed blade, guidesfor said "movable blade, and a forwardly 'arqectmg. "down-turned tongue on said slide whichengages and 'reciprocate's the movable blade with 'theslide'."

5. In a 'barbers hair clipper,- a .frame,-a

relatively movable blade's'on said frame, a

transmission element laterally movable in the. frame, and aflexible' shaft iset' a't approximately 90 to the framea'nd having a low speed drive directly connected to said transmission element. H i f b In testimony whereof 1 afliX my simnature. DAVID N. swATfiELL. \Vi'tnessz' a NoMIE WELSH.

handle setapproX'imately'at 45tothe frame, v 

